<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <" src="<script src=" https://cdn.bootcss.com/jquery/3.4.1/jquery.js"> </script> </head> <body>
        <p>hello world</p>
        <script>
            $("p").click(function () {
                $(this).html("change")
            })
        </script>
        </body>

</html>